Canadian Utilities Limited announced today that it has notified the registered shareholder of its Cumulative Redeemable Second Preferred Shares Series Y ("Series Y Preferred Shares") of a conversion privilege and applicable dividend rates. As a result, subject to certain conditions, the holders of Series Y Preferred Shares will have the right to choose one of the following options with regard to their shares:

To retain any or all of their Series Y Preferred Shares and continue to receive a fixed rate quarterly dividend; or

To convert, on a one-for-one basis, any or all of their Series Y Preferred Shares into Cumulative Redeemable Second Preferred Shares Series Z ("Series Z Preferred Shares") of Canadian Utilities Limited and receive a floating rate quarterly dividend.

Effective June 1, 2017, the annual dividend rate for the Series Y Preferred Shares is set at 3.40% for the five-year period from and including June 1, 2017 to but excluding June 1, 2022 and the dividend rate for the Series Z Preferred Shares is set at an annual rate of 2.95% for the three-month period commencing June 1, 2017 to but excluding September 1, 2017. The dividend rate for the Series Z Preferred Shares will be reset each quarter. Both rates were calculated according to the terms described in the prospectus supplement of Canadian Utilities Limited dated September 15, 2011.

Beneficial owners of Series Y Preferred Shares who wish to exercise their right of conversion should communicate as soon as possible with their broker or other nominee and ensure that they follow their instructions in order to meet the deadline to exercise such right, which is 3 p.m. (Calgary time) / 5 p.m. (Toronto time) on May 17, 2017. Any notices received after this deadline will not be valid. As such, it is recommended that this be done well in advance of the deadline in order to provide the broker or other intermediary with time to complete the necessary steps.

The foregoing conversions are subject to the conditions that: (i) if Canadian Utilities Limited determines that there would be less than 2,000,000 Series Y Preferred Shares outstanding on June 1, 2017, then all remaining Series Y Preferred Shares will automatically be converted into Series Z Preferred Shares on June 1, 2017, and (ii) alternatively, if Canadian Utilities Limited determines that there would be less than 2,000,000 Series Z Preferred Shares outstanding on June 1, 2017 after giving effect to conversion notices received, no Series Y Preferred Shares will be converted into Series Z Preferred Shares. If either of these scenarios occurs, Canadian Utilities Limited will issue a news release to that effect on or before May 24, 2017.

Holders of the Series Y Preferred Shares and the Series Z Preferred Shares, as applicable, will have the opportunity to convert their shares again on June 1, 2022, and every five years thereafter as long as the shares remain outstanding.

For more information on the terms of, and risks associated with an investment in, the Series Y Preferred Shares and the Series Z Preferred Shares, please see Canadian Utilities Limited's prospectus supplement dated September 15, 2011, which can be found under Canadian Utilities Limited's profile on SEDAR at www.sedar.com.

With approximately 5,400 employees and assets of $19 billion, Canadian Utilities Limited is an ATCO company. ATCO is a diversified global corporation delivering service excellence and innovative business solutions in Structures & Logistics (workforce housing, innovative modular facilities, construction, site support services, and logistics and operations management); Electricity (electricity generation, transmission, and distribution); Pipelines & Liquids (natural gas transmission, distribution and infrastructure development, energy storage, and industrial water solutions); and Retail Energy (electricity and natural gas retail sales). More information can be found at www.canadianutilities.com.

Forward-Looking Information:

Certain statements contained in this news release may constitute forward-looking information. Forward-looking information is often, but not always, identified by the use of words such as "anticipate", "plan", "estimate", "expect", "may", "will", "intend", "should", and similar expressions.

Forward-looking information involves known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking information.

The Company's actual results could differ materially from those anticipated in this forward-looking information as a result of regulatory decisions, competitive factors in the industries in which the Company operates, prevailing economic conditions, and other factors, many of which are beyond the control of the Company.

The Company believes that the expectations reflected in the forward-looking information are reasonable, but no assurance can be given that these expectations will prove to be correct and such forward-looking information should not be unduly relied upon.

Any forward-looking information contained in this news release represents the Company's expectations as of the date hereof, and is subject to change after such date. The Company disclaims any intention or obligation to update or revise any forward-looking information whether as a result of new information, future events or otherwise, except as required by applicable securities legislation.